Bluetooth adapters are a simple way to connect your phone to your factory car radio. Once you pair your phone to the Bluetooth kit your phone and car stereo will be fully integrated. You will hear callers over your vehicles speakers while the directional microphone allows callers to hear you clearly with no headset or wires. If your phone has "A2DP" support you can stream and control music on most kits from music on your phone or even from Pandora.